The enamel seal was invented by Russo, a Frenchman, around 1626. Through experiments, he mixed tar, cinnabar, and shellac of different ratios and heated them into a red or brownish-red enamel. Then he selected a metal mold with appropriate patterns and printed it on the enamel that has not yet solidified. After cooling, clear patterns can be left.
Some people also believe that it was invented by the Chinese in the 11th century, introduced into Europe through India, and quickly became a magic weapon for European confidential communications. However, one thing is certain, the lacquered seal has replaced the bamboo slip seal and the bamboo slip seal, which is the expansion and development of the "clay seal" and should be used only after the simple seal.
With time, it is inevitable to call it an "enamel seal". The key to reviewing the existing form of the enamel seal is to recognize its historical achievements in transmitting confidential letters and protecting information rights and interests.
Since the Jin Dynasty, paper and silk have been in vogue and sealed with enamel. It has a long history and has played an active role in the application of various important documents, valuables, cultural relics exits, and cultural relics identification and protection.
In the 22nd year of the reign of Emperor Guangxu of the Qing Dynasty, the national postal service was opened. It was stipulated that envelopes should be sealed with red stripes, written with a brush, and sealed with a seal. The expensive ones are sealed with enamel. Although there were changes in the period of the Republic of China, the old system was extended. It was also widely used in government confidential documents. The French seal it with enamel and distinguish the contents by the color of the enamel. Red paint is the official document, brown paint is the dinner invitation, and white paint is the wedding celebration. It is worth noting that the enamel seal is also used by the UPU, which stipulates that it is used for valuable letters in various countries, as well as for the sealing of precious cultural relics.
Each piece of lacquer has a story behind it. The gift is dignity and honor. With lacquer as the carrier, it inherits culture and connotation.